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(No Model.)

J. B. z. DUMAIS. SOOT AND SPARK ARRESTER.

Patented July 9, 1889.

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I UNITED STATES PATENT OFFICE.

JEAN B. Z. DUMAIS, OF CHICAGO, IL LI NOIS, ASSIGNOR OF TllREE-FOURTHS TO ABRAHAM BACHRACI-l, CHARLES BACHRACH, AND DOMINICK L.

LANGEVIN, ALL OF SAME PLACE.

SOOT AND SPARK ARRESTER.

SPECIFICATION forming part of Letters Patent No. 406,710, dated July 9, 1889.

Application filed February 20, 1889. Serial No. 300,612. (No model.)

To aZZ whom it may concern.-

Be it known that I, JEAN B. Z. DUMAIS, a subject of the Queen of Great Britain and Ireland, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Soot and Spark Arresters, which is fully set forth in the following specification, reference being had to the accompanying drawings, in which Figure l is a sectional view of a chimney having my improvement applied thereto; Fig. 2, a plan section taken on the line 1 1 of Fig. l, and Fig. 3 a detail sectional view taken 011 the line 2 2 of Fig. 1. Like letters refer to like parts in all the figures of the drawings.

My invention relates to spark and soot arresters, and has for its object to provide a simple, cheap, and eifective device which may be placed in the chimney or stove-pipe, and

which, without interrupting the draft, will effectually prevent the passage of sparks and soot.

To these ends my invention consists in cer- 2 5 tain novel features, which I will now proceed to describe, and will then particularly point out in the claims.

In thedrawings, A represents the chimney, provided with the smoke-flue a, which serves 0 to carry off the products of combustion. Across this flue there extend transverse rods 1), which serve to support a vertical shaft B, connected thereto at top and bottom. Mounted on this shaft so as to revolve is the spiral 5 arrester O, which in the present instance is shown as supported by a collar 1) on the shaft, said collar being arranged immediately below the point where the shaft passes loosely through the upper end of the spiral. The

0 spiral is of gradually increasing diameter downward, its lower convolution being as large as the dimensions of the flue a will permit, and the whole being allowed to hang freely, being supported at its upper end by 5 the collar 1) and at its lower end by a transverse rod 12 attached at its ends to the lower convolution of the spiral, and loosely embracing the shaft l3,'be'ing provided with a loop or eye b for this purpose. The body of the strip which composes the spiral C is inclined downward and outward,as shown at c in Fig. 3, and there is provided at the outer margin of the said strip a depending flange c.

D indicates a cone attached to the shaft 13 below the spiral C, and having its apex arranged upward and about on alevel with the bottom of the spiral, its base being of a diameter as great as the dimensions of the flue a will permit.

There is formed in the chimneyA a slot a, and through this slot there extends into the chimney a lever E, the outer end of which is I provided with a cord 6 or other suitable device for operating the same, while its inner end is connected to a vertical rod E passing through a guide 6', and having its upper end, which is preferably provided with an enlargement 6 arranged to strike the spiral C when the lever E is operated.

The operation of the deviceis as follows: As the products of combustion pass upward through the fiue a they first encounter the cone D, which deflects them outward, a sufficient space being left between the cone and the walls of the flue to permit their further passage upward. They then pass upward through the spiral, which rotates under the influence of the current thus formed, and therefore does not act as an obstruction to the draft. The products of combustion grad- 8c ually pass out through the spaces between the convolutions of the spiral, and as these convolutions overlap each other they arrest and cause the deposit of the sparks and soot and prevent their being carried out of the chimney. The convolutions overlap each other somewhat, and this arrangement, taken in conjunction with the downward inclination of the body sand the depending flange 0, serves to so deflect the products of combustion as to obtain a maximum of efficiency and arrest all the sparks and soot. This inclination also serves to prevent the accumulation of the soot and sparks upon the spiral to a great extent, while the inclination of the upper surface of the cone D performs a similar service for this latter. In case, however, the soot does ac cumnlate upon the spiral, it may be readily removed by operating the lever E, when the rod E will strike the s )iral and im art a yertical vibration to the same, which will eii'ectually dislodge whatever may have accumulated thereon.

It is obvious that various modifications in the details of construction and arrangement of the parts may be made without departing from the principle of my invention, and I therefore do not wish to be understood as limiting myself strictly to the precise details hereinbefore described, and shown in the drawings.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the chimney A, having fine a, of the rotating spiral O, mounted in said fine, and having an increasing diameter from top to bottom, substantially as and for the purposes specified.

2. The combination, with the chimney A, 11 ving flue a, of the rotating spiral, C, mounted in said flue, and composed of a strip having a body inclined transversely downward and on tward, and provided at its outer margin with a depending flange, the said spiral increasing in diameter from top to bottom, whereby the con volutions are caused to overlap each other, substantially as and for the purposes specified.

The combination, with the chimney A, havin flue a, of the rotating spiral C, mounted in said flue, and having an increasing diameter from top to bottom, and the cone D, arranged in the flue below the spiral with its apex upward, and having a base of a diameter equal to the diameter of the bottom of the spiral, substantially as and for the purposes specified.

The combination, with the chimney and its flue, of the spiral loosely suspended therein', and means for vibratingv said spiral, substantially as and for the purposes specified.

5. The combination, With the chimney and its flue, of the spiral loosely suspended therein, the lever E, extending through a slot in the chimney, and the rod E, operated by said lever and adapted to strike the spiral, substantially as and for the purposes specified.

JEAN B. Z. DUMAIS.

\Vitnesses CARRIE FEIGEL, IRVINE MILLER. 

